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An Image Processing Method for Background Suppression

A background suppression and image processing technology, applied in the field of image processing, can solve the problems of low signal-to-noise ratio of HTV images, and achieve the effect of suppressing background interference, uniform and concentrated intensity, and high energy

Active Publication Date: 2022-03-04
NORTHWEST INST OF NUCLEAR TECH
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to reduce the background interference of image signals, solve the problem of low signal-to-noise ratio of HTV images in complex flow fields, and propose a background suppression image processing method based on the combination of space, space domain transformation and frequency domain transformation

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Embodiment Construction

[0047] The present invention is described in detail below in conjunction with accompanying drawing and specific embodiment:

[0048] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention , but not to limit the scope of the present invention.

[0049] Taking the experimental data measured by HTV in the scramjet model experiment as an example, the background suppression image processing method based on the combination of space, space domain transformation and frequency domain transformation proposed by the present invention can effectively remove image background noise.

[0050] see figure 1 , the technical solution of the present invention is achieved in this way:

[0051] St...

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Abstract

The invention belongs to the technical field of image processing, and in particular relates to an image processing method for background suppression, aiming at reducing the background interference of image signals and solving the problem of low signal-to-noise ratio of HTV images under complex flow fields. The technical scheme of the present invention is: the method firstly uses the spatial transformation module to remove the OH fluorescence background interference from the digital image collected at the current sampling time through the adaptive difference method; digital image L D Carry out background noise removal; finally call the frequency domain transformation module, through the wavelet filter method to the current digital image L S Perform background noise removal; effectively improve the image preprocessing capability of HTV velocity measurement in high-temperature and high-speed flow fields, reduce background interference of image signals, and improve image signal-to-noise ratio.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to an image processing method for background suppression. Background technique [0002] In the research of various high-speed flows and the research of engines and other power devices involving various types of flow phenomena, the velocity of the flow field is a very important parameter, which has great significance for the study of flow field structure, numerical calculation model verification, engine design evaluation, etc. Very important. On-line high-precision measurement of flow field velocity has become one of the focuses and hotspots of related research. At present, methods for on-line measurement of flow field velocity include particle velocity imaging (abbreviated: PIV) method and molecular marker trace velocity measurement (abbreviated: MTV) method, etc. Among them, PIV technology needs to sow tracer particles in the flow field, which will pollute th...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00G06T5/50G06T7/136
CPCG06T5/002G06T5/009G06T5/50G06T7/136G06T2207/20064G06T2207/20024
Inventor 邵珺方波浪张振荣叶景峰李国华王晟
Owner NORTHWEST INST OF NUCLEAR TECH